Spray Calendar. 339 



set, repeat 1 ; 4. Eepeat after 10 to 14 days; 5. When fniit is 

 nearly grown, ammoniacal copper carbonate; 6, 7, etc., repeat 5 at 

 intervals of 5 to 7 days if necessary. For Yelloios^ see Bulletin 75. 



Pear. 



Leaf-Uight or Fruit-spot. (1. As buds are swelling copper sul- 

 phate solution); 2. Just before blossoms open, Bordeaux mixture; 

 3. After fruit has set, repeat 2 ; 4, 5, etc., repeat 2 at intervals of 

 2 to 3 weeks as appears necessary. — Leaf -blister. 1. Before buds 

 swell in spring, kerosene emulsion, diluted 5 to 7 times — Psylla. 

 1. When first leaves have unfolded in spring, kerosene emulsion 

 diluted 15 times; 2, 3, etc., at intervals of 2 to 6 days repeat 1 until 

 the insects are destroyed. See Bulletin 108. — Slug. See under 

 Cherry. 



Plum. 



Brown rot. See under Peach. — Leaf-hUght. (1. When first 

 leaves have unfolded, Bordeaux mixture); 2. When fruit has 

 set, Bordeaux mixture ; 3 4, etc., repeat 2 at intervals of 2 to 3 

 weeks, use a clear fungicide after fruit is f grown. — Blachhnot, 



1. During first warm days of early spring, Bordeaux mixture; 



2. Repeat 1 w^hen buds are swelling ; 3. During latter part of 

 May, repeat 1 ; 4. Repeat 1 during middle of June (5. Repeat 1 in 

 July). See Bulletin 81. — Gurculio^ spraying is not always satis- 

 factory ; jar the trees after f]-uit has set, at intervals of 1 to 3 days 

 durino^ 2 to 5 weeks. — Plum Scale. 1. In autumn when leaves 

 have fallen, kerosene emulsion, diluted 4 times; 2 and 3. In spring 

 before buds open, repeat 1. See Bulletin 108. — San Jose Scale. 

 Thorough applications of kerosene emulsion as recommended under 

 Plum Scale may prove effective if followed later in the season by 

 others, diluting the emulsion to avoid injuring foliage. 



Potato. 



Early blight. 1. When vines are f grown, Bordeaux mixture; 

 2 and 3, repeat 1 at intervals of ii to 3 weeks (only partially success- 

 ful). — Rot. 1. During middle of July, Bordeaux mixture ; 2 and 

 i5, at intervals of 1 to 3 weeks, repeat 1. — Scab. Soak uncut seed 

 potatoes 1|- hours in solution of 1 ounce corrosive sublimate in 8 

 gallons water. — Potato beetle. 1. When beetles first appear, arsen- 

 ites. 2 and 3, repeat 1 when necessary. See Bulletin 113. 



